Given the geologic history of the Northeast, there are scattered pockets of climbable rock throughout the area. A lot of these are on private land and have, over the years, led to locals having their own secret areas. You may or may not agree with the concept of "secret" areas, but due to access issues, some areas are destined to remain "secret." Some, like the Ayer boulders, have legal access, a few amazing problem, and can be shared with everyone. Some will never be accessible to the public. Kai Webler has compiled a bonus video to his Northeast series showing a slew of these problems in Western Mass. If you want to check these problems out, I suggest hunting Kai down and begging him for the goods....